Description
Honeywell L91A1151 Mid-Scale Throttling Pressure Control Overview
The Honeywell L91A1151 is a mid-scale throttling pressure control designed to deliver precise, proportional pressure regulation across a 5–150 PSI operating range. Built for demanding HVAC, boiler, and hydronic system applications, this controller modulates system output in response to changing pressure conditions — helping maintain stable, efficient operation and protecting equipment from pressure fluctuations.
Key Features
- Mid-scale throttling (proportional) control action for smooth, continuous pressure modulation
- Wide operating pressure range: 5–150 PSI
- Designed for integration into boiler, hydronic, and commercial HVAC pressure control systems
- Reliable Honeywell construction for long service life in demanding environments
- Compact design for straightforward installation and service
Typical Applications
- Boiler and hydronic heating system pressure control
- Commercial HVAC pressure modulation
- Industrial process pressure regulation within the 5–150 PSI range
Product Details
- Brand: Honeywell
- Model / SKU: L91A1151
- Control Type: Mid-Scale Throttling (Proportional)
- Pressure Range: 5–150 PSI









